Sash-balance.



No. 729,994. PATENTED JUNB2, 1903.

` M. BLUME.

SASH BALANCE.

ArPLIoATIoN HLED 00T. 6, 1902.

No MoDBL.

"mm/'mm llllIII 1 I Jl l I5 if -1 NITE h'rains Patented June 2, 1903.

sAsH-BALANCE.

SPECIFICATION forming' part of Letters 'Patent N 0. 729,994, dated June 2, 1903.

Application filed October 6, 1902.V

To all whom it may concern:

' followingL is a full, clear, and exact descrip- Be it known that I, MARTIN BLoME, a citizen of the United States, and a residentof St. Charles, in the county of St. Charles and State vof Missouri, have invented new and useful Improvementsin-Sash-Balances, of which the tion. r

My invention relates to improvements Vin sash-balances; and the object that l have in view is the provision of a simple Vand cheap construction which may be easily and quicklyapplied to a window, is capable of ready operation in order to facilitate the elevation of the sash, and is equipped with a positive locking device to hold the spring-driven drum under restraint until such time as it is desired to raise the sash.

Further objects and advantages of the invention will appear in the course of the subjoined description, and the noveltywill be delined by the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure lis a sideelevation of a part of an ordinary window, showing my improved sashbalance applied thereto. Fig. 2 is an velevation, on an enlarged scale, ofthe balancewith the rack removed from the Window. Fig. 3 is a vertical sectional elevation, on an enlarged scale, showing the improved balance applied to a part of the casing and to a part of the sash; and Fig. 4 isa horizontal section' showing the means for locking the spring-A driven drum against rotation. 4

A designates a part of the window-casing, and B is a part of the lower sash. This sash is provided in one of its stiles with a longitudinal recess or groove b, and in this recessv is arranged a vertical rack -5, the latter being secured to the stile in any suitable way. As shown by Fig. 3, the sash-stile is provided with a transverse metallic socket 6, in which is fitted a stem 7, the latter being providedA with a washer S and secured at its outer. end to an end portion of tho vertical rack' 5.

The casing A is provided withareces's or chamber 9 and with a lateral offset or extension 10. (See Figs. 1 and 4.) In the chamber 9 is secured a drum-casing 11, having a Serial No. 126,147. (No model.)

vheads being fastened to the rim in any suitable way, or, if desired, one of the headsV may be made an integral part of the rim. VThe heads of the drum are mounted loosely on the arbor or spindle 13 in order that the drum ymay turn freely thereon, and the rim 14 of the drum is provided with an annular series of gear-teeth 14, which project through aV s lot 18, provided in the face-plate l2, whereby the drum is geareddirectly to the rack 5, which is carried by the sash B. Within this ldrum is arranged a coiled spring 19, one end of which yis fastened to the arbor or spindle 13, while the other end of said spring is fasn tened in any suitable Way to the rim of the drum, whereby said spring is adapted to impel or turn the drum in one direction and to make itexert pressure in an upward direction on the rack 5, thus disposing the parts in a way to balance the weight of the sash and to assist in the elevation thereof.

The head 16 of the drum is provided with a circular series of apertures 20, (see Figs. 3 and 4,) and into either of these apertures is adapted to fit a lockinglbolt or dog 21. Said dog is slidably mounted in a chambered arm 22, which extends outwardly from the casing 11, said arm being made in a single piece with one side of the casing,"or it may be arranged in'a stationary position to have an operative relation to said casing. The chambered arm 22 is tted snugly in the offset 10 of the chamber or recess inthe window-casing A, and the arm is held in place and practically covered by a plate 23, which is fastened to the window-casing in a suitable way. The bolt 2l is slidably mounted in the hollow arm 22, so as to move in a direction toward and from the'apertured head 16l of the drum, and this bolt is provided at its outer end with a head'24, to which is attached a finger-piece Y'2 5f, the latter being slidable in a slot26, v"which is provided in the plate 23.

A coiled spring'27 is'iitted loosely around the bolt or dog 2l, and one end of said spring bears against a suitable part of the hollow arm 22,

Ico

Athe drum and into one of the apertures of the head 16.

One of the drums and racks is used in connection with each sash, and for the lower sash the drum is mounted in the casing so as to lie opposite to the upper part of said sash when it is lowered. Assuming that the sash is raised and the operator desires to lower it, the bolt 21 is withdrawn by manipulating the knob 25, and then the sash is pulled down. The movement of the rack turns the drum through the teeth 14:, and the spring 19 is thus placed under tension, after which the knob is released,`so that the bolt is pressed by the spring 27 into engagement With the perforated drum-head 16. Before raising the sash the bolt v2l is again withdrawn from engagement with the drum, and the spring 19 is free to exert its energy through the drum on the sash, thus assisting the operator in raising the sash.V

The socket or thirnble 6 in the sash houses a coiled spring 28, A(shown by Fig. 2,) said spring being seated against the washer or collar S on the steril 7. The springs on the stems rectly thereon and one of said heads provided f with a row of apertures, a spring fastened to the drum and the spindle, a bolt sldably confined in said arm, and a spring also eonined in said arm and acting against the bolt to project it into an aperture of the perforated drum-head.

Inl testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MARTIN BLOME.

Witnesses:

MAX MILLER, JOHN THEILMANN. 

